This dense temporary seismic network was installed after the M=5 earthquake in Ubaye on 14th April 2014. It was deployed by a joined effort of 2 French laboratories : ISTerre (UGA, CNRS, IRD, USMB, IFSTTAR in Grenoble) and Goazur (UCA, CNRS, IRD, OCA in Nice) under the general coordination of the post-seismic french consortium. It completed the permanent RESIF and Sismalp networks which follow seismic activity in the Alps. The region is particulary interesting as it has already been facing seismic swarms (2002-2004, Jennatton et al., 2007, Leclre et al., 2013) and mainshock aftershocks sequences (Thouvenot at al., 2016) in the past. Understanding the physical mechanisms leading to such seismic swarns is a challenge towards a better assessment of seismic hazard in the Ubaye Alpine valley.